<html>
<head>
<title>Example 2.8</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
body {margin:0px;padding:0px;font-size:12px;text-align:center;}
body > div {text-align:center; margin-right:auto; margin-left:auto;} 
.content{width:900px;}
.content .left{
	float:left;
	width:20%;
	border:1px solid #FF0000;
	margin:3px;
}
.content .center{float:left;border:1px solid #FF0000;margin:3px;width:57%}
.content .right{float:right;width:20%;border:1px solid #FF0000;margin:3px}
.mo{height:auto;border:1px solid #CCC;margin:3px;background:#FFF}
.mo h1{background:#ECF9FF;height:18px;padding:3px;cursor:move}
.mo .nr{height:80px;border:1px solid #F3F3F3;margin:2px}
h1{margin:0px;padding:0px;text-align:left;font-size:12px}
</style>
<script>
var dragobj={}
window.onerror=function(){return false}
function on_ini(){
	String.prototype.inc=function(s){return this.indexOf(s)>-1?true:false}
	var agent=navigator.userAgent
	window.isOpr=agent.inc("Opera")
	window.isIE=agent.inc("IE")&&!isOpr
	window.isMoz=agent.inc("Mozilla")&&!isOpr&&!isIE
	if(isMoz){
		Event.prototype.__defineGetter__("x",function(){return this.clientX+2})
		Event.prototype.__defineGetter__("y",function(){return this.clientY+2})
	}
	basic_ini()
}
function basic_ini(){
	window.$=function(obj){return typeof(obj)=="string"?document.getElementById(obj):obj}
	window.oDel=function(obj){if($(obj)!=null){$(obj).parentNode.removeChild($(obj))}}
}
window.onload=function(){
	on_ini()
	var o=document.getElementsByTagName("h1")
	for(var i=0;i<o.length;i++){
		o[i].onmousedown=function(e){
			if(dragobj.o!=null)
				return false
			e=e||event
			dragobj.o=this.parentNode
			dragobj.xy=getxy(dragobj.o)
			dragobj.xx=new Array((e.x-dragobj.xy[1]),(e.y-dragobj.xy[0]))
			dragobj.o.style.width=dragobj.xy[2]+"px"
			dragobj.o.style.height=dragobj.xy[3]+"px"
			dragobj.o.style.left=(e.x-dragobj.xx[0])+"px"
			dragobj.o.style.top=(e.y-dragobj.xx[1])+"px"			
			dragobj.o.style.position="absolute"
			var om=document.createElement("div")
			dragobj.otemp=om
			om.style.width=dragobj.xy[2]+"px"
			om.style.height=dragobj.xy[3]+"px"
			dragobj.o.parentNode.insertBefore(om,dragobj.o)
			return false
		}
	}
}
document.onselectstart=function(){return false}
window.onfocus=function(){document.onmouseup()}
window.onblur=function(){document.onmouseup()}
document.onmouseup=function(){
	if(dragobj.o!=null){
		dragobj.o.style.width="auto"
		dragobj.o.style.height="auto"
		dragobj.otemp.parentNode.insertBefore(dragobj.o,dragobj.otemp)
		dragobj.o.style.position=""
		oDel(dragobj.otemp)
		dragobj={}
	}
}
document.onmousemove=function(e){
	e=e||event
	if(dragobj.o!=null){
		dragobj.o.style.left=(e.x-dragobj.xx[0])+"px"
		dragobj.o.style.top=(e.y-dragobj.xx[1])+"px"
		createtmpl(e)
	}
}
function getxy(e){
	var a=new Array()
	var t=e.offsetTop;
	var l=e.offsetLeft;
	var w=e.offsetWidth;
	var h=e.offsetHeight;
	while(e=e.offsetParent){
		t+=e.offsetTop;
		l+=e.offsetLeft;
	}
	a[0]=t;a[1]=l;a[2]=w;a[3]=h
  return a;
}
function inner(o,e){
	var a=getxy(o)
	if(e.x>a[1]&&e.x<(a[1]+a[2])&&e.y>a[0]&&e.y<(a[0]+a[3])){
		if(e.y<(a[0]+a[3]/2))
			return 1;
		else
			return 2;
	}else
		return 0;
}
function createtmpl(e){
	for(var i=0;i<12;i++){
		if($("m"+i)==dragobj.o)
			continue
		var b=inner($("m"+i),e)
		if(b==0)
			continue
		dragobj.otemp.style.width=$("m"+i).offsetWidth
		if(b==1){
			$("m"+i).parentNode.insertBefore(dragobj.otemp,$("m"+i))
		}else{
			if($("m"+i).nextSibling==null){
				$("m"+i).parentNode.appendChild(dragobj.otemp)
			}else{
				$("m"+i).parentNode.insertBefore(dragobj.otemp,$("m"+i).nextSibling)
			}
		}
		return
	}
	for(var j=0;j<3;j++){
		if($("dom"+j).innerHTML.inc("div")||$("dom"+j).innerHTML.inc("DIV"))
			continue
		var op=getxy($("dom"+j))
		if(e.x>(op[1]+10)&&e.x<(op[1]+op[2]-10)){
			$("dom"+j).appendChild(dragobj.otemp)
			dragobj.otemp.style.width=(op[2]-10)+"px"
		}
	}
}
</script>
</head>
<body>
<div class=content>
	<div class=left id=dom0>
		<div class=mo id=m0>
			<h1>dom0</h1>
			<div class="nr"></div>
		</div>
		<div class=mo id=m1>
			<h1>dom1</h1><div class="nr"></div>
		</div>
		<div class=mo id=m2><h1>dom2</h1><div class="nr"></div></div>
		<div class=mo id=m3><h1>dom3</h1><div class="nr"></div></div>
	</div>
	<div class=center id=dom1>
		<div class=mo id=m4><h1>dom4</h1><div class="nr"></div></div>
		<div class=mo id=m5><h1>dom5</h1><div class="nr"></div></div>
		<div class=mo id=m6><h1>dom6</h1><div class="nr"></div></div>
		<div class=mo id=m7><h1>dom7</h1><div class="nr"></div></div>
	</div>
	<div class=right id=dom2>
		<div class=mo id=m8><h1>dom8</h1><div class="nr"></div></div>
		<div class=mo id=m9><h1>dom9</h1><div class="nr"></div></div>
		<div class=mo id=m10><h1>dom10</h1><div class="nr"></div></div>
		<div class=mo id=m11><h1>dom11</h1><div class="nr"></div></div>
	</div>
</div>
</body>
</html>
